Abstract
We extend earlier work by Essick et al. [1,2] with a study of similarities among sky localization maps corresponding to gravitational-wave transients. Earlier in 2016, the Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) announced the first direct observation of gravitational waves from binary black holes [3,4]. Motivated by the fact that multiple detection and localization algorithms are invoked in the search for gravitational waves [5], we introduce image-processing methods which allow us to quantify the relatedness of sky maps corresponding to the same astrophysical events. Such approach may lead to improvement in background rejection in the searches of gravitational-wave transients. We present our method and its prospects for improving the efficiency in the astrophysical signal identification.
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